Incident
On December 11, 2014, at approximately 2100 central standard time, a Dassault Fan Jet Falcon, registration N827AA, experienced a flight control malfunction while on approach to Shreveport Regional Airport (KSHV) in Shreveport, Louisiana. The aircraft was operated by USA Jet Airlines under 14 CFR Part 135 as a non-scheduled international flight. The flight originated from Hamilton (CYHM), Ontario, Canada, at about 1925 eastern standard time. Night visual meteorological conditions prevailed, and the flight operated on an instrument flight rules flight plan. Both the pilot and copilot were not injured, and the airplane was not damaged.
Flight
According to the operator, the copilot was flying a visual approach to runway 14. After the autopilot disengaged, the copilot flew the airplane from 2,000 feet above ground level (agl) to 20 feet agl using "more aft pressure than normal." The copilot stated that below 20 feet agl and into the landing flare, the yoke hit the aft stop. The airplane landed without incident.
Post-Flight Examination
Following the landing, a post-flight examination revealed that the elevator trim was in the full nose-down position and could not be returned to takeoff or neutral position. The flight crew used the emergency trim to move the trim to the takeoff position. After the trim circuit breaker was reengaged, the elevator trim moved back to the full nose-down position.
Findings
Examination of the trim system found wire 1CF21E20 shorted between terminal junction 3/18 and terminal junction 3/21. This short resulted in power at terminal junction 3/21 regardless of the position of the trim switch on the captain's control. Further examination also found the connector at terminal junction 106 shorted. The wires and connectors were removed and replaced, and the trim anomaly was resolved.